Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
NUMERICAL ANALYSIS OF THE STRESS FIELD AND STRAIN FIELD OF THE CRACK PRESENT IN A DISSIMILAR WELDED JOINT
Submission Author:
DANIEL NICOLAU LIMA ALVES , PB
Co-Authors:
DANIEL NICOLAU LIMA ALVES, MARCELO CAVALCANTI RODRIGUES
Presenter: DANIEL NICOLAU LIMA ALVES
doi://10.26678/ABCM.COBEM2017.COB17-2228
Abstract
The search for structural efficiency in mechanical systems has been strongly used with the objective of economic optimization and structural safety. Studies carried out in recent years have sought to understand the response of materials to the presence of cracks in dissimilar welded joints, but are not yet sufficient to fully discover fracture resistance responses due to the heterogeneity present in these joints. This work analyzes the behavior of the crack tip zone, from the perspective of fracture mechanics, located in a dissimilar welded joint used in the union of pipes present in the offshore oil production lines investigated by Almeida (2014). It was possible observing critical stress area due to numerical tool of the finite element method. A preferential plastic flow was also observed in samples of dissimilar welded joints, which the literature claims to be a precursor of the crack growth path. The numerical analysis showed a convergent behavior in relation to the plastic flow and developed during the tests performed. The results obtained are in agreement with the literature and the experimental study of Almeida (2014).
Keywords
crack, stress field, strain field, Numerical analysis
